Background: I have an old domain that used to host a large sporting portal on it, I took it down for a couple of years but kept a holding page in situ. At the end of May I decided that because the domain was a nice PR4 with lots of good links I should do something with it. I built a nice wordpress site and did all the SEO things on it like sitemaps, seo friendly URLs etc. As I have added content over the last few weeks traffic has risen about 500% in the last month which is encouraging. Then over the last 24 hours I noticed that the page rank has gone all together. I do not normally make a big thing of it and just use it as a guide to a sites authority. I am sort of expecting it to come back in a few days if it is just a Google update taking place. The interesting thing is that my site is now suddenly dominating the SERPs for some extremely hard keywords and phrases! Anyone got any ideas what might be happening? I will be gobsmacked if my SERPs stay the same!